<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>表白墙</title>
</head>
<body>

    <!-- 创建表白墙 -->

    <div class="container">
        <h1>表白墙</h1>
        <p>输入后点击提交，会将信息显示在表格中</p>
        <div class="row">
            <span>谁：</span>
            <input class="edit" type="text">
        </div>
        <div class="row">
            <span>对谁：</span>
            <input class="edit" type="text">
        </div>
        <div class="row">
            <span>说什么：</span>
            <input class="edit" type="text">
        </div>
        <div class="row">
            <input type="button" value="提交" class="submit">
        </div>
    </div>

    <!-- 调整样式 -->
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .container {
            width: 400px;
            margin: 0 auto;
        }

        h1 {
            text-align: center;
            padding: 20px 0;
        }

        p {
            color: #666;
            text-align: center;
            font-size: 14px;
            padding: 10px 0;
        }

        .row {
            height: 40px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        span {
            width: 100px;
            line-height: 40px;
        }

        .edit {
            width: 200px;
            height: 30px;
        }

        .submit {
            width: 304px;
            height: 40px;
            color: white;
            background-color: orange;
            border: none;
        }

    </style>

    <!-- 实现提交 -->
    <script>
        // 给点击按钮注册点击事件
        var submit = document.querySelector('.submit');
        submit.onclick = function() {
            //1. 获取到编辑框的内容
            var edits = document.querySelectorAll('.edit');
            var from = edits[0].value;
            var to = edits[1].value;
            var message = edits[2].value;
            console.log(from + "," + to + "," + message);
            if (from == '' || to == '' || message == '') {
                return;
            }
            //2. 构造新元素
            var row = document.createElement('div');
            row.className = 'row';
            row.innerHTML = from + '对' + to + '说：' + message;
            //3. 添加新元素
            var container = document.querySelector('.container');
            container.appendChild(row);
            //4. 同时清理之前输入框的内容
            for (var i = 0; i < 3; i++) {
                edits[i].value = '';
            }
        }
    </script>

</body>
</html>